Standardize usage of virtual/override/final in storage/

storage/browser/fileapi/local_file_stream_writer.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef STORAGE_BROWSER_FILEAPI_LOCAL_FILE_STREAM_WRITER_H_
 #define STORAGE_BROWSER_FILEAPI_LOCAL_FILE_STREAM_WRITER_H_
 
 #include <utility>
 
 #include "base/callback.h"
@@ skipping 13 matching lines @@
 namespace net {
 class FileStream;
 }
 
 namespace storage {
 
 // This class is a thin wrapper around net::FileStream for writing local files.
 class STORAGE_EXPORT LocalFileStreamWriter
     : public NON_EXPORTED_BASE(FileStreamWriter) {
  public:
-  virtual ~LocalFileStreamWriter();
+  ~LocalFileStreamWriter() override;
 
   // FileStreamWriter overrides.
-  virtual int Write(net::IOBuffer* buf, int buf_len,
-                    const net::CompletionCallback& callback) override;
-  virtual int Cancel(const net::CompletionCallback& callback) override;
-  virtual int Flush(const net::CompletionCallback& callback) override;
+  int Write(net::IOBuffer* buf,
+            int buf_len,
+            const net::CompletionCallback& callback) override;
+  int Cancel(const net::CompletionCallback& callback) override;
+  int Flush(const net::CompletionCallback& callback) override;
 
  private:
   friend class content::LocalFileStreamWriterTest;
   friend class FileStreamWriter;
   LocalFileStreamWriter(base::TaskRunner* task_runner,
                         const base::FilePath& file_path,
                         int64 initial_offset,
                         OpenOrCreate open_or_create);
 
   // Opens |file_path_| and if it succeeds, proceeds to InitiateSeek().
@@ skipping 40 matching lines @@
   scoped_ptr<net::FileStream> stream_impl_;
   net::CompletionCallback cancel_callback_;
 
   base::WeakPtrFactory<LocalFileStreamWriter> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(LocalFileStreamWriter);
 };
 
 }  // namespace storage
 
 #endif  // STORAGE_BROWSER_FILEAPI_LOCAL_FILE_STREAM_WRITER_H_